Method of preparing water used in process of dyeing textile fibers.



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GERHARD SANDERS, OF PATERSON, NEW JERSEY.

METHOD OF PREfARING WATER USED IN PROCESS OF DYEING TEXTILE FIBERS.

. Specification of Letters Patent.

' Patented July as, 1908.

Application filed June 11, 1907. Serial No. 378,454, (Specimens) To allwhom it may concern:

Be it known that I, GER-HARD SnNDERS, a citizen of the United States,residing in Paterson, Passaic county, New Jersey, have invented acertain new and useful Improve ment in the Methods of Preparing WaterUsed in the Process of Dyeing Textile Fibers;

and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same 2 My inventionconsists in an improved method of treating water employed in the processof dyeing textile fibers, such as wool, silk, cotton and the like, andit has for its object to so treat the water that when mixed with the proer dyeing substances the dyed material wil offer a softer feel and ahigher luster, while also being better adapted to receive andpermanently hold the color.

In carrying out my invention-,- 1 take a suitable wood, containingtannin, such as oak, more or less finely divide it, as by grinding, andthen mix it with an acid, such as muriatic acid; the proportion, inbulk, of acid to wood is about five to one. I then boil the mixture forabout three hours. After the mixture is cooled, the liquid is poured offand the resultant solid portion or pulp is thoroughly Washed or cleansedso as to rid the pulp of the acid. The pulp is then placed in a suitablereceptacle and enough water introduced to just about cover it, andhaving put in the water washing soda in the proportion of about 15 lbs.of soda to 100 bs. of the pulp, the mixture is boiled for about onehour. The mixture is then cooled, the liquid is poured OE and theresultant solid ortion or pulp again cleansed or Washed until it is freeof the soda. The thus treated Wood product or pulp is now put in a longcylinder in compressed condi tion and water forced through it, the pulpacting as a filtering body and not only mechanically abstracting rom thewater the impurities contained therein but chemically operating thereon.The Water so treated, when used in the process of dyeing textile fibers,very materially affects the latter so that a piece of goods, as forinstance plush, when compared with another the water used in the dyeingof which has not been thus treated, will at once present a much higherluster, a softer feel etc. Besides, the character of the fibers is soessentially afiected that they notonly better receive but morepermanently-hold the dye. This is due to the tannin left in a sparinglysoluble form in the Wood-pulp if the wood were not treated as hereindescribed by the acid, first, and then by the soda, media, the tannin atfull strength would undesirably and very materially discolor thematerial to: be. dyed, such as delicate light shades, while if thetannin were entirely neutralized or removed from the wood the eifectwhich it imparts to the water, i. e., the softening thereof, and whichproduces the softer feel and higher luster which I obtain, would belost.

Having thus fully described my invention, what I claim as new and desireto secure by Letters Patent is:

1. The method of treating water to be used in the dyeing of textilefibers which consists in subjecting finely civided wood containingtannin to the action of an acid in the presence of heat at the boilingpoint,.

separating the solid portion from the iquid portion of the resultantmixture, subjecting said solid portion to the action of an alkalinesolution in the presence of heat at the boiling point, separating thesolid portion from the liquid )ortion of the mixture last resulting, andinally causing the water to be passed through the solid portion of saidlast resulting mixture, substantially as described. 2. The method oftreating water to be used in the dyeing of textile fibers which consistsin subjecting finely divided wood containing tannin to the action of afanninfixing agent, thensubjecting the thustreated wood to a neutralizerof the fixing agent, and finally causing the water to be passed throughthe wood so treated, substantially as described.

' In testimony that I claim the foregoing, I have hereunto set my handthis 10th day of June, 1907.

GERHARD SANDERS. Witnesses:

JOHN .STEWARD, WM. A. MERZ.

or corresponding

